Determine the mass in grams of 3.88 × 10²¹ atoms of copper. (The mass of one mole of copper is 63.55 g.)

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

A5.00 g of a in . g of at aa 5.00 g of b in . g of .?at .

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)